Cloud point extraction–atomic absorption spectrometry for pre-concentration and determination of cadmium in cigarette samples

Abstract

A new complexing agent, 2-((2-((1H-benzo[d]imidazole-2yl)methoxy)phenoxy)methyl)-1H-benzo[d]imidazole (BIMPI), was used in cloud point extraction and applied for selective pre-concentration of trace amounts of cadmium in cigarette samples. Cadmium was complexed with BIMPI in a buffer solution (pH = 10) using Triton X-114 as surfactant and quantitatively extracted into a small volume of the surfactant-rich phase after centrifugation. Under optimized conditions (pH = 10.0, 0.8 × 10(-4) mol L(-1) BIMPI and 0.08 % (w/v) Triton X-114), calibration graph was linear in the range of 34.0-1,670.0 μg L(-1). The proposed method was applied to the determination of Cd in various cigarette (tobacco) samples which gave satisfactory results.

Application of Cloud Point Extraction for Cadmium in Biological Samples of Occupationally Exposed Workers: Relation Between Cadmium Exposure and Renal Lesion

“…The accuracy of the proposed procedure was assessed by the analysis of certified reference materials (CRM), and the observed values for Cd were found to be in good agreement with the certified values ( Table 3). The proposed methodology was compared to other CPE methods reported recently in the literature [16,[30][31][32][33][34][35][36][37]. The distinct features are summarized in Table 4.…”